.all{
	min-height: 100vh;
	background-color: #f9f4dc;
	background-size: cover;
	background-attachment: fixed;
	min-height: 100vh;
	position: fixed;
	width: 100vw;
	.tc{
		width: 100%;
		.video{
			width: 100%;
		}
	}
}
.title{
	width: 100%;
	color:black;
	padding:30rpx 0;
	margin: 0rpx auto;
	text-align: center;
	font-size: 42rpx;
	font-weight: 700;
}
.teacher,.time{
	text-align: center;
	margin: 20rpx auto;
}
.time{
	margin-bottom: 80rpx;
}
